All over the world, Tadanao (Tadanao 
) is an extremely rare male first name. Much less frequently, Tadanao is the last name as well as the forename.
| shimazu tadanao [島津忠直] samurai of Sengoku period. lord of Shinano-Naganuma (b. 1550) |
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| shimazu tadanao [島津忠仍] samurai of Sengoku - early Edo period (b. 1574) |
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| matsudaira tadanao [松平忠尚] daimyo of the early Edo period; lord of Kori (b. 1651) |
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| honda tadanao (b. 1844) |
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Abe, Adachi, Akashi, Kawabe, Komori, Koyama, Kusaka, Kimura, Tanaka, Takada, Takeno, Fujita, Yamada, Matsuda, Miyazawa, Kumagai, Yoshida, Murakami, Katayama, Nakamura, Watanabe, Yamamoto, Suzuki, Zanma, Ozaki, Okada, Eto, Ito, Ono, Oya, Sato, Sudo, Seki, Aoki, Kato, Kubo, Hashimoto, Goto, Endo, Hino, Saito, Kondo, Koike, Nagao, Naito, Filho, Inoue, Ishii, Neto, and Matsudaira